It is possible for the eyes to see lesser than what obtains and for the brain to interpret marginally than what is actual. This is one of the understandings derived from science overtime (from the field of physics particularly). For instance, right from my elementary days, I have been used to seeing a white tubed illuminating bar fondly called “Fluorescent Light”; my eyes see white whenever I look up and my brain interprets it to be white whenever I give it a thought. However, physics has it proven that white light is not white after all.

The Physicist says that White lightis the complete mixture of all the wavelengths of the visible spectrum. This means that if I have beams of light of all of the colors of the rainbow and focus all of the colors onto a single spot, the combination of all of the colors will result in a beam of white light.